See this previous post for an ALSA modprobe patch that should get speakers working,
but it does not have an audio level control in ALSA
Audio doesn't work in internal speaker but it works on Headphones - #14 by nikgnomic
In a later post (#17) there are links to a method for a full working solution but it is not something an inexperienced user could implement easily
If one user can find the audio configuration data from a Windows VM and patch ALSA, the ALSA developers can make a patch for the Linux kernel so that the audio for this model laptop will work
If I had access to a similar laptop I would attempt this, but I have never used a VM before so it might take me a few weeks, and a few litres of coffee, and a lot of inappropriate language!